黑豆皮乙醇提取物/玉米淀粉/卡拉胶复合膜的物化性质及生物活性表征

Physicochemical properties and biological activity characterization of ethanol extract of black soybean coat/corn starch/carrageenan composite films

该研究以玉米淀粉为基材,卡拉胶作为增强剂,甘油作为增塑剂,制备复合膜,并探讨了不同添加量的黑豆皮乙醇提取物对复合膜的物化性质及生物活性的影响。结果表明,提取物的加入使得复合膜的颜色加深,不透明度增大,并且影响了复合膜的微观结构;红外光谱和X-射线衍射结果表明,提取物的加入可抑制淀粉分子的重结晶现象,影响复合膜的机械性能和水蒸气透过率,并降低复合膜的玻璃化转变温度;改善复合膜的生物活性,提高复合膜的抗氧化性能和抑菌性能。该研究结果可为黑豆皮乙醇提取物/玉米淀粉/卡拉胶复合膜的生产和应用提供理论基础。

Traditional plastic packaging is easy to cause environmental pollution and harm human health.Corn starch,as a rich resources in nature which is a potential good natural polymer packaging material can be used.However,the single corn starch film is insufficient in terms of mechanical properties and biological activity.Therefore,in this study,corn starch was used as the substrate,carrageenan was used as an enhancer,glycerol was used as a plasticizer to prepare the composite films,and the influence of different concentrations of ethanol extract of black soybean coat on the physicochemical properties and biological activity of the composite films were explore.The results showed that the color and opacity of the composite films increased and affected the microstructure of the composite films.The infrared spectrum and X-ray diffraction results showed that the addition of the extract inhibited the recrystallization of the starch molecules.Moreover,the addition of the extracts affected the mechanical properties and water vapor permeability of the composite membrane,and it also reduced the glass transition temperature of the composite films.Furthermore,the addition of the extracts improved the biological activity of the composite films,the antioxidant and antibacterial properties of the composite films.The results could provide the theoretical basis for the production and application of the ethanol extract of black soybean coat/corn starch/carrageenan composite films.